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Two Round Cairns on the Bryn is a prehistoric round cairn located in Wales and protected by Cadw under reference GM463. The monument comprises two distinct cairn structures built upon bedrock of the South Wales Upper Coal Measures Formation, a Carboniferous-age deposit of mudstone, siltstone, sandstone, coal, ironstone and ferricrete. The underlying geology reflects the ancient deltaic environment in which these rocks formed during the Westphalian period, millions of years before the cairns were constructed.
Round cairns of this type typically date to the Bronze Age, roughly 2200 to 700 BC, and served as burial monuments for prominent community members. The construction of two separate cairns suggests either a temporal sequence of burials or the commemoration of distinct individuals or family groups. The stony upland terrain of the site would have provided abundant stone for cairn construction whilst also offering commanding views across the surrounding landscape.
The monument's survival and official protection reflect its archaeological significance as evidence of Bronze Age burial practice and settlement patterns in Wales. The paired cairn arrangement offers insights into prehistoric social organisation and mortuary custom in the region. Such monuments remain important markers of the cultural landscape inhabited by Wales's earliest farming communities.
Two Round Cairns on the Bryn is a scheduled monument protected by Cadw under reference GM463. View the official record →
Two Round Cairns on the Bryn is a prehistoric round cairn located in Wales and protected by Cadw under reference GM463.
Two Round Cairns on the Bryn dates from the prehistoric period, and is classified as a round cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Two Round Cairns on the Bryn is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is GM463.
Several scheduled monuments lie within 10 km, including Caerphilly Castle (4.1 km), The Pottery, Nantgarw (5.6 km), Caerffili Mountain Shaft Mounds (6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Two Round Cairns on the Bryn's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Two Round Cairns on the Bryn stands on South Wales Upper Coal Measures Formation, bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.